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Asteroid 7 Iris

Available Resources

Asteroid 7 Iris Sky Charts and Coordinates

This is a simplified sky chart, showing where Asteroid 7 Iris is now with respect to the brightest stars and constellations. More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Asteroid 7 Iris in Sagittarius on January, 22 2017
High Precision Live Sky Chart
20h 02m 44s
-17° 57’ 06”
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Asteroid 7 Iris Rise and Set Times

Today's Asteroid 7 Iris rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 108.0°
Max altitude: 20.6°
Azimuth: 252.0°

Asteroid 7 Iris Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 7 Iris with respect of the Sun and the orbits of the major planets. The position of Asteroid 7 Iris and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Asteroid 7 Iris Ephemeris

The following table lists the ephemerides of Asteroid 7 Iris computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 7 Iris in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2017 Jan 15 10.27 19h 49m 09s -18° 40’ 44” Sagittarius
2017 Jan 16 10.26 19h 51m 06s -18° 34’ 46” Sagittarius
2017 Jan 17 10.26 19h 53m 03s -18° 28’ 44” Sagittarius
2017 Jan 18 10.26 19h 54m 59s -18° 22’ 36” Sagittarius
2017 Jan 19 10.26 19h 56m 56s -18° 16’ 22” Sagittarius
2017 Jan 20 10.27 19h 58m 51s -18° 10’ 01” Sagittarius
2017 Jan 21 10.28 20h 00m 48s -18° 03’ 37” Sagittarius
2017 Jan 22 10.29 20h 02m 44s -17° 57’ 06” Sagittarius
2017 Jan 23 10.30 20h 04m 41s -17° 50’ 30” Sagittarius
2017 Jan 24 10.31 20h 06m 38s -17° 43’ 48” Sagittarius
2017 Jan 25 10.32 20h 08m 35s -17° 37’ 00” Capricornus
2017 Jan 26 10.33 20h 10m 31s -17° 30’ 06” Capricornus
2017 Jan 27 10.34 20h 12m 28s -17° 23’ 08” Capricornus
2017 Jan 28 10.35 20h 14m 23s -17° 16’ 04” Capricornus

Distance of Asteroid 7 Iris from Earth

The following chart shows the distance of Asteroid 7 Iris from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval. The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 7 Iris is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Asteroid 7 Iris from Earth between January 2013 and January 2030

Light Curve of Asteroid 7 Iris

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 7 Iris, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Asteroid 7 Iris between January 2013 and January 2030

Asteroid 7 Iris Physical Data

The following shows the known values of the most important physical parameters of Asteroid 7 Iris. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 199.83 km 0.0157
Sideral Rotation 7.1390 hours 0.2983
Absolute Magnitude 5.51
Geometric Albedo 0.2766

Asteroid 7 Iris Orbital Elements

The following table lists the orbital elements of Asteroid 7 Iris at epoch 30 July 2016 00:00 UTC (JD: 2457600.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.23139413
Orbit inclination i 5.52358048°
Perihelion distance q 1.83330159 AU
274,258,015 km
Aphelion distance Q 2.93715792 AU
439,392,572 km
Semi-major axis a 2.38522976 AU
356,825,293 km
Orbital period period 3.6800 years
1,345.5311 days
Date of perihelion transit Tp 2017-Nov-18 11:19:05
2,458,075.9716 JD
Argument of perihelion peri 145.36356528065°
Longitude of the ascending node node 259.57036980389°
Mean anomaly M 232.78646573329°
Mean motion n 0.26755234°/day
Closest approach to Earth* 2017-Oct-31
Distance of closest approach* 0.84895483 AU
127,001,834 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2030-Jan-01, with a sampling interval of 1 day.